25555417842 has 8 divisors (see below), whose sum is σ = 51110835696. Its totient is φ = 8518472612.

The previous prime is 25555417781. The next prime is 25555417843. The reversal of 25555417842 is 24871455552.

It is a sphenic number, since it is the product of 3 distinct primes.

25555417842 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 25555417791 and 25555417800.

It is not an unprimeable number, because it can be changed into a prime (25555417843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129618148 + ... + 2129618159.

It is an arithmetic number, because the mean of its divisors is an integer number (6388854462).

Almost surely, 2^25555417842 is an apocalyptic number.

25555417842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25555417842 is a wasteful number, since it uses less digits than its factorization.

25555417842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259236312.

The product of its digits is 2240000, while the sum is 48.

The spelling of 25555417842 in words is "twenty-five billion, five hundred fifty-five million, four hundred seventeen thousand, eight hundred forty-two".